[math-fun] hexadoku grids

Hi, I'm looking for solved hexadoku grids (like sudoku, but 16x16 instead of 9x9). Ideally, I'd like to find symmetric grids or grids where each contiguous 4x4 block uses each character only once, not just the main 4x4 blocks. Any hints? Thanks, Kerry Mitchell -- lkmitch@gmail.com www.fractalus.com/kerry